go-json/decode_string.go

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2020-04-23 19:39:20 +03:00
package json
import (
"errors"
"unsafe"
)
type stringDecoder struct {
}
func newStringDecoder() *stringDecoder {
return &stringDecoder{}
}
func (d *stringDecoder) decode(ctx *context, p uintptr) error {
bytes, err := d.decodeByte(ctx)
if err != nil {
return err
}
*(*string)(unsafe.Pointer(p)) = *(*string)(unsafe.Pointer(&bytes))
return nil
}
func (d *stringDecoder) decodeByte(ctx *context) ([]byte, error) {
ctx.skipWhiteSpace()
buf := ctx.buf
cursor := ctx.cursor
buflen := ctx.buflen
if buf[cursor] != '"' {
return nil, errors.New("unexpected error key delimiter")
}
start := cursor + 1
cursor++
for ; cursor < buflen; cursor++ {
tk := buf[cursor]
if tk == '\\' {
continue
}
if tk == '"' {
break
}
}
if buf[cursor] != '"' {
return nil, errors.New("unexpected error string")
}
literal := buf[start:cursor]
//fmt.Printf("string = [%s]\n", string(literal))
cursor++
ctx.cursor = cursor
return literal, nil
}